The other thing I’m going to experiment with is not attaching the Tenax at all for driving with the hood down, but securing them with a couple of my daughters’ hair bands around the Tenax “mushroom head” to the inside of the roof frame hinge (there is a conveniently placed dome head nut inside). It will be interesting to see if this set-up provides enough wind and weather proofing whilst driving.
Correction … I meant to say “for driving with the hood *up*” but can’t see a way of editing my post.